bin/ps/nlist.c

   1 /*-
   2  * Copyright (c) 1990, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)nlist.c  8.4 (Berkeley) 4/2/94
  34  * $FreeBSD: src/bin/ps/nlist.c,v 1.12.6.2 2001/08/01 05:04:48 obrien Exp $
  35  * $DragonFly: src/bin/ps/nlist.c,v 1.4 2004/03/19 17:47:49 cpressey Exp $
  36  */
  37
  38 #include <sys/types.h>
  39 #include <sys/time.h>
  40 #include <sys/resource.h>
  41 #include <sys/sysctl.h>
  42
  43 #include <stddef.h>
  44
  45 #include "ps.h"
  46
  47 fixpt_t ccpu;                           /* kernel _ccpu variable */
  48 int     nlistread;                      /* if nlist already read. */
  49 int     mempages;                       /* number of pages of phys. memory */
  50 int     fscale;                         /* kernel _fscale variable */
  51
  52 int
  53 donlist(void)
  54 {
  55         size_t oldlen;
  56
  57         oldlen = sizeof(ccpu);
  58         if (sysctlbyname("kern.ccpu", &ccpu, &oldlen, NULL, 0) < 0)
  59                 return (1);
  60         oldlen = sizeof(fscale);
  61         if (sysctlbyname("kern.fscale", &fscale, &oldlen, NULL, 0) < 0)
  62                 return (1);
  63         oldlen = sizeof(mempages);
  64         if (sysctlbyname("hw.availpages", &mempages, &oldlen, NULL, 0) < 0)
  65                 return (1);
  66         nlistread = 1;
  67         return (0);
  68 }